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CN-120484684-B - Sand-blasting-free ceramic paint, preparation method and spraying method

CN120484684BCN 120484684 BCN120484684 BCN 120484684BCN-120484684-B

Abstract

The application provides a sand blasting-free ceramic paint and a preparation and spraying method thereof, which consists of a binder, ceramic filler, color paste, functional auxiliary agent and diluent, wherein the ceramic filler comprises silicon carbide, sodium pyrithione and silicon dioxide powder. The method reduces the dependence degree of the ceramic coating on the sand blasting treatment of the base material by optimizing the composition of the ceramic filler, the formula of the binder and the spraying process parameters, builds a double bonding mechanism of physical anchoring and chemical bonding on the surface of the base material by the synergistic effect of the ceramic filler and the curing treatment of the binder, effectively improves the connection strength of the ceramic coating and the base material, does not need to carry out sand blasting treatment on the surface of the base material, greatly improves the spraying efficiency of the ceramic coating, obviously shortens the curing time of the ceramic coating by optimizing the spraying process parameters, reduces the input cost of the spraying process, is not limited by the condition of the surface of the base material, and has the advantages of strong adhesive force, long service life, stable mechanical property and convenient popularization and implementation.

Inventors

  • LIAO CHENGWEI
  • ZHU KUNXIANG

Assignees

  • 清远市伟畅达化工有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (6)

  1. 1. The sand blasting-free ceramic coating is characterized by comprising, by weight, 45-55 parts of a binder, 10-15 parts of a ceramic filler, 20-25 parts of color paste, 1-5 parts of a functional auxiliary agent and 8-12 parts of a diluent; Wherein the ceramic filler comprises silicon carbide, sodium pyrithione and silicon dioxide powder; wherein the mass ratio of the silicon carbide to the sodium pyrithione to the silicon dioxide powder is (0.8-1.3) 1:1; the particle size of the silicon carbide ranges from 35 mu m to 45 mu m; The particle size range of the sodium pyrithione is 20-30 mu m; The particle size of the silicon dioxide powder ranges from 15 mu m to 20 mu m; The binder consists of polymethyl polysiloxane and silica sol; Wherein the mass ratio of the polymethyl polysiloxane to the silicon dioxide sol is (2.2-3.5): 1; the functional auxiliary agent comprises propylene glycol methyl ether and silicone oil; wherein the mass ratio of the propylene glycol methyl ether to the silicone oil is (0.8-1): 1; the diluent comprises isopropanol, cyclohexanone and ethylene glycol diethyl ether; wherein the mass ratio of the isopropanol to the cyclohexanone to the glycol diethyl ether is (5.5-6.2) 1:1.
  2. 2. The method for preparing the sand blasting-free ceramic paint as claimed in claim 1, comprising the following steps: Step 101, preparing primer Sequentially adding a binder, ceramic filler, primer color paste, functional auxiliary agents and a diluent into a high-speed dispersing machine according to a preset target proportion, and dispersing for 15-20 min at 800-1200 rpm and 25-40 ℃ to obtain a primer; Step 102, preparing the finishing paint And (3) sequentially adding the binder, the ceramic filler, the finishing paint color paste, the functional auxiliary agent and the diluent into a high-speed dispersing machine according to a preset target proportion, and dispersing for 15-20 min at 800-1200 rpm and 25-40 ℃ to obtain the finishing paint.
  3. 3. The method for producing a sand blasting-free ceramic paint according to claim 2, wherein in step 101 and step 102, the binder is cured; the curing treatment comprises the following steps: Step 201, sequentially putting the polymethylpolysiloxane and the silica sol into a curing barrel according to a preset target proportion, curing for 4-6 hours at room temperature under the condition that the rolling speed is 120-150 rpm, and obtaining the curing adhesive.
  4. 4. The spraying method of the paint prepared by the preparation method of the sand blasting-free ceramic paint as claimed in claim 2, comprising the following steps: Step 301. Preheat Preheating the substrate to 45-60 ℃; Step 302, primer spraying Spraying the prepared primer onto the preheated substrate in the step 301; step 303, spraying finishing paint Directly spraying the prepared finish paint onto the primer sprayed in the step 302; Step 304, baking And (3) transferring the base material sprayed in the steps 302 and 303 into a baking oven, and baking for 15-20 min at 80-280 ℃ to finish spraying the sand-blasting-free ceramic coating.
  5. 5. The method for spraying a ceramic paint without sandblasting according to claim 4, wherein the primer is sprayed to a thickness of 25 μm to 35 μm and the topcoat is sprayed to a thickness of 5 μm to 15 μm.
  6. 6. The method of spraying a ceramic coating according to claim 4, wherein step 304 comprises a heating baking section, a heat-preserving baking section and a cooling section sequentially performed in time sequence; The heating and baking section heats the sprayed base material to 280 ℃ at a heating speed of 40-50 ℃ per minute; the heat preservation and baking section is to preserve the temperature of the base material at 280 ℃ for 10-20 min, and the cooling section is to cool the base material from 280 ℃ to room temperature under natural conditions.

Description

Sand-blasting-free ceramic paint, preparation method and spraying method Technical Field The application belongs to the technical field of coatings, and particularly relates to a sand-blasting-free ceramic coating, a preparation method and a spraying method. Background In the prior art, the ceramic coating plays a vital role in the fields of construction, industry, household electrical appliances and decoration, can provide excellent corrosion resistance, high temperature resistance and decoration, is widely applied to the surface protection of base materials such as metal, concrete and the like, and is a good coating choice for household (mainly kitchen supplies), industry and small household electrical appliances. However, ceramic coatings currently on the market have some technical bottlenecks in the construction process, especially in terms of surface pretreatment and construction efficiency. In the prior art, the conventional ceramic coating construction generally requires sand blasting treatment of a substrate to remove oxide layers, dirt and grease on the surface, thereby improving the adhesive force of the coating. Although the sand blasting treatment can effectively improve the bonding strength of the coating, the process is complex, the cost is high, and a large amount of dust and noise can be generated at the same time, so that the environment and the health of constructors are negatively influenced. In addition, the sand blasting treatment has high requirement on the flatness of the surface of the substrate, and if the surface of the substrate has micro defects or irregular shapes, the sand blasting treatment can cause uneven adhesive force of the coating, thereby affecting the overall performance of the coating. In recent years, although some sand blasting-free paint technologies have been developed, there are still a number of problems in practical application of these paints. For example, some sand blasting-free paint has insufficient adhesion, especially on the surface of wet or complex substrate, and other sand blasting-free paint has poor corrosion resistance and high temperature resistance, although the adhesion is improved, so that the paint cannot meet the long-term use requirements of the industrial and building fields. In addition, the existing construction process of the sandblasting-free paint is still complicated, multiple coating and curing are needed, the construction efficiency is low, and the application is difficult to adapt to large-scale industrial application. Therefore, in order to solve the problem of dependence of the existing ceramic coating on sand blasting treatment in the construction process, and improve the comprehensive performance and construction efficiency of the coating, development of a sand blasting-free ceramic coating is urgently needed at present so as to meet the requirements of modern industry and building fields on efficient, environment-friendly and high-performance coatings. Disclosure of Invention The application aims to solve the technical problems that in the prior art, the traditional ceramic coating has limited connection performance with a substrate, the substrate is required to be subjected to sand blasting treatment before spraying, so that on one hand, the working procedure is increased, the spraying efficiency of the ceramic coating is reduced, on the other hand, the cost of manpower and material resources is increased, strict requirements are provided for the surface roughness of the substrate, and the fluctuation of spraying quality is large. In order to solve the technical problem, the application also provides a preparation method of the sand-blasting-free ceramic paint; In order to solve the technical problem, the application also provides a spraying method of the sand-blasting-free ceramic paint. The application adopts the following scheme that the sand blasting-free ceramic coating comprises the following components in parts by weight: 45-55 parts of adhesive 10-15 Parts of ceramic filler Color paste 20-25 parts 1-5 Parts of functional auxiliary agent 8-12 Parts of diluent; Wherein the ceramic filler comprises silicon carbide, sodium pyrithione and silicon dioxide powder; Wherein the mass ratio of the silicon carbide to the sodium pyrithione to the silicon dioxide powder is (0.8-1.3) 1:1. In some of the possible embodiments of the present invention, The particle size of the silicon carbide ranges from 35 mu m to 45 mu m; The particle size range of the sodium pyrithione is 20-30 mu m; the particle size of the silicon dioxide powder is 15-20 mu m. In some of the possible embodiments of the present invention, The binder comprises polymethylpolysiloxane and silica sol; Wherein the mass ratio of the polymethyl polysiloxane to the silica sol is (2.2-3.5): 1. In some of the possible embodiments of the present invention, The functional auxiliary agent comprises propylene glycol methyl ether and silicone oil; wherein the mass ratio of the pro